Using a medium saucepan, add whipping cream and place over medium heat. Heat, stirring occasionally, until hot.
Remove from heat and add chopped chocolate; stir until chocolate has fully melted.
{Optional} To create a shinier ganache, stir in corn syrup.
Let ganache rest at room temperature for 15-20 minutes, or until cool.
For the Cake
Once cooled, spread the ganache around the center of the Carvel® Ice Cream Cookie Cake, leaving ~1” on all sides.
Working in the center of the cake, gently press several pieces of broken ice cream cones and brownie brittle into the cake.
Gradually work out towards the edges of the cake, adding other toppings like peanut butter wafer cookies, peanut butter sandwich cookies, peanut butter cups, salted peanuts and other candy decorations.
Keep cake frozen until ready to serve. (Tip: Run warm water over a knife before slicing. The warm knife will help slice the ice cream cake easily.)